Hello,
Recently, my cistern pump stopped working. At first, it was pumping irregularly, meaning sometimes it worked, sometimes it didn’t.
So, I took the pump out of the cistern and cleaned it roughly, but it’s not easy to open it up.
Then I put it back in, and the problem was that the fuse always blew when I plugged it in.
So, I took it out again, waited about a week, and put it back in. Now the fuse doesn’t blow anymore, but the pump still doesn’t move any water.
The pump is the following model: Umbra Pompe Acuafluss.
The pump simply sits in the water, is plugged in, and is supposed to pump water when the tap is opened.
Recently, my cistern pump stopped working. At first, it was pumping irregularly, meaning sometimes it worked, sometimes it didn’t.
So, I took the pump out of the cistern and cleaned it roughly, but it’s not easy to open it up.
Then I put it back in, and the problem was that the fuse always blew when I plugged it in.
So, I took it out again, waited about a week, and put it back in. Now the fuse doesn’t blow anymore, but the pump still doesn’t move any water.
The pump is the following model: Umbra Pompe Acuafluss.
The pump simply sits in the water, is plugged in, and is supposed to pump water when the tap is opened.
W
wiltshire12 Jun 2025 13:42Bulldrob schrieb:
According to the manual, the pump can be operated both upright and lying down. Unusual for this type of design. You learn something new every day.
M
MachsSelbst12 Jun 2025 17:36The pump cannot be easily opened because it needs to remain permanently watertight under pressure. As a non-professional, you cannot realistically ensure this permanent seal once it has been opened.
Therefore, it is better to buy a new pump rather than tamper with components you are not qualified to handle.
It is important to emphasize, and continuously remind, that electricity in general—and especially when combined with water—is life-threatening.
By the way, one more question: Which one trips? The fuse or the residual current device (RCD)? If there is no RCD installed, one should be added as soon as possible.
Therefore, it is better to buy a new pump rather than tamper with components you are not qualified to handle.
It is important to emphasize, and continuously remind, that electricity in general—and especially when combined with water—is life-threatening.
By the way, one more question: Which one trips? The fuse or the residual current device (RCD)? If there is no RCD installed, one should be added as soon as possible.
MachsSelbst schrieb:
The pump cannot simply be opened because it must be permanently pressure-water-tight. As a layperson, you cannot possibly ensure that after opening it.That's what I said, didn’t I?
MachsSelbst schrieb:
Therefore, you should rather buy a new pump instead of tampering with things you are not qualified for.Thanks, I return the compliment.
MachsSelbst schrieb:
It always needs to be emphasized or reminded that electricity in general, and especially in combination with water, poses a serious risk to life.Really? Thanks for the info.
MachsSelbst schrieb:
Oh, and one more question. Which trips? The circuit breaker or the RCD? If you don’t have an RCD, then one should be installed as soon as possible.Perfect, I installed one yesterday.
W
wiltshire13 Jun 2025 10:27MachsSelbst schrieb:
The pump cannot be easily opened because it must remain permanently watertight under pressure. As an amateur, you simply cannot guarantee this watertightness after opening it. That’s true. But since the pump is already broken, you might as well take a look inside, learn, and experiment. It’s also clear that you can’t “guarantee” the seal after a successful repair—but sealing something is not rocket science. I don’t see any real safety risk here, because if water gets into the pump, the residual current device (RCD) will trip. Also, no people bathe in the reservoir. So the risk of electric shock is low and, in my view, acceptable.
A basic understanding of electrical systems and some manual skills are enough to repair household appliances with low complexity. Whether it’s a well pump, washing machine, or lawn mower doesn’t really matter. Usually, the biggest challenge is figuring out the order of disassembly and reassembly rather than the technology itself. There are plenty of YouTube videos available for guidance.